Electric clipper



M. H. KOTZEBUE ct. l?. 1923;

ELECTRC CLIPPER wie@ mmm 16, 1920 E Y Y l `Inl/whim M H ffazelmf. v

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Oct. 2, 1923.

' M. H. KTZEBUE ELECTRIC CLIPPER Filed March 16, 1,920 2 SheS-Sheei; 2

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Patented Oct. 42, 1,923.

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' nnmnann n. iro'rzEBUE, or rULsA, oxmnoxa, nssxcnroa or oma-nm 'ro Gmac: s. amar m 01m-mr ro L. n. nu'r'rs, Born or TULSA, omen ELFITBIC CLIPPER.

Application leld larok 18, 1820. Serial lo. $6,821.

To all whom it may concern.'

Be it known that I, MEINHARD H. Kurzn- BUE, a citizen of the United States residing at Tulsa, in the. county of Tulsa and l State f Oklahoma, ha've invented certain new and useful Impxro'vements in Electric Clippers; and l do ereby declare the fol.- lowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains tomake and use the same.

' This invention relates to rcertain new and useful improvements in electric clippersand has for its primary object, the provision 16 of clippers which may be operated either by a direct current or an alternating current.

Another object of the invention resides in the provision of electric clippers of the above stated character in which the cutting blade may be arranged for operation in a manner similar to the conventional form of hand operated clippers and which can be effectively used for cutting hair or shear-- ing animals such as shee and the like. n

A further object of t e invention resides in the provision of electric clippers of the above stated character which may be produced for efficient operation without material alteration of the conventional form of cutter blades 0r plates vand the spring heretofore employed for causing a return stroke of the movable cutter blade.

The invention has for a still further object, the provision of electric clippers of thel above stated character which will be of simple construction and ope-ration as well yas highly eicient in use.

The invention has or a still further object, the provision of an improved electric driven device of the character stated, in which the clippers may be readily removed vand other implements such as scissors, maar,

sagers, and the like substituted.

Vith the above and otherobjects in view as will appear as the descriptionproceeds, the invention consists in `the novel construction, combination and arrangement of cooperating parts as hereinafter more specifi- `-cally set forth, claimed and shown inthe accompanying drawings forming a part of this application and in which Figure 1 is a side elevation of the improved clippers. y

Figure 2 is a longitudinal section through held in position by the adjusting thumb nut the slome, at right angles to the viev of Figure Figure 3 is a detail transverse section on the plane of line 3--3 of Figure 2, looking inthe direction indicated by the arrows.

yFigure is a detail sectional view on the plane of Ime 4-4 of Figure 2, looking in' the direction indicated by the arrows.` Figure 5 is an enlarged detail view showmg the connection between the plunger and the operating arm for the movable cutting plate or blade.l Figure 6 is diagrammatic view of the wirlng, in order 'that the circuit may be traced. Referring more in detail to the drawings,

1n whlch slmllar reference characters des- 4ignate corresponding parts throughout the several views, 1 indicates the stationary cutter blade or plate having the teeth 2 formed along lts Outer or cutting edge for cooperatlon with the cutting teeth 3 of the movable cutter blade or plate 4, in the usual manner. The cover and tension plate 5 is positioned over the movable cutter blade or plate 4 and 6 on the supporting ost 7 Vwhich also serves to support the orang: arms 8, one arm of which is engaged in the socket 9 of the movable cutter blade or plate 4 to reciprocate the latter upon the stationary cutter blade or plate 1. The remaining arm of the bell `cra-nk or crank arm 8 has a socket 10 formed therein to receive the ball or spherical end of a connecting and operating rod 12, the opposite ball or spherical end 13 of which. is engaged in a socket 14 formed on the end of a short threaded rod .15, the'purpose ofY which will presently appear. The last mentioned arm of thel crank arms 8 is. also provided with a turned extension 16 engaged 95 in one end of a spring socket 17 formed with the stationary cutting blade or plate 1, theV opposite end of which is closed by the spring adjusting screw ca 18, A

spring 19 is positioned' in the soc et 10 and 10 'has Vone end bearing against the screw cap 18 while its opposite andy bears against the extension 16 of the crank arm 18 to forceY the movable blade or plate 4 inv one direction from the stationary cutting blade or plato 1, as will be later clearly understood.

From the socket 17 1s extended an elongated arm 20 which is secured by suitable securing members 21 to the cylindrical handie 22, composed of fiber, hard rubber or 11 asf insulated metal, as may be desired. The

arm 20 has an outwardly curved side exL tension 23 with which may be engagedv the contact so as to form a closed circuit. Ex

tending from within the lower end of the split brass tube 24, around the primary and secondary lwindings of the co1l, to the soft iron washers 27 to complete the magnetic circuit to the plunger, as will be later clearly understood, is the pole piece 28, composed of soft iron wire or laminated sheet steel the elements of which are preferably U-shaped as shown and the inner legs of which are shorter than the outer legs thereof. It will be evident. that the purpose of the tube 24 being split is to prevent t-he How of eddy currents around the wall of the tube. The pole piece serves as the magnetic conductor around the coil. The soft iron washers 27 are positioned around the split brass tube, immediately above or forwardly of the coil and are split to reduce eddy currents and serve to' complete the magnetic circuit to the plunger 29 which is positioned or reciprocation in the outer or forward end of the split brass tube 24, as shown in Figure; 2 of the drawings. The plunger 29 is preferably laminated and made of soft iron, the advantages of which will be apparent to those familiar with this art. The fiber base 30 is positioned in the cylindrical handle 22, around the forward end of the split brass tube 24 and contacts with the outer face of the sott iron washers 27. The fiber'base 30 is secured in position by a -long screw 31 or other suitable securing member engaged through the arm 2O and the side of the cylindrical handle 22 and into the fiber base 30, as lines in Figure l of the drawings.

The laminated plunger 29 has a socket 32 in its outer or forward end, within which is threaded one end of the iron screw 33, the opposite end of which is threaded in one end of the interiorly threaded brass connection 34 adapted to reciprocate through a central opening in the outer or forwar 35 of the insulated cylindrical handle 22, the opposite end of the brass connection 34 receiving the short threaded connection l5, previously described, thereby completing the connection between the plunger 29 and the cutter `blade or plate 4. Adjustably mounted upon the iron screw 33, are the fiber stroke regulating disks 36 spaced from one the lower contact post Vis supplied to the device by shown by dottedv another `and fromv the end of the laminated plunger 29, by spacing nuts or jam nuts 37, also mounted u on the iron screw 33. The movable or sli ing sleeve 38 of the lower movable contact member is mounted upon 39 having electrical connection with one ole of the corefas will be readily understood), the post 39 projecting upwardly 'or forwardly from the fiber base 30. The sleeve 38 has a laterally projecting finger projection 40 which extends between the fiber stroke regulating disks 36 to be engaged vby the latter to move the sleeve 38 upon the post 39, as will be later clearly understood. The spring 41 is mounted upon the fiber base 30, adjacent one side of the cylindrical handle 22 and has its free end bearing .against the sleeve 38 to retain the latter in adjusted position.

The sleeve '38 carries the lower or inner contact point 42 upon its outer end for engagement with the free end of the curved spring arm 43 forming a part of the remaining or upper contact member and mounted upon the contact supporting post 44. It will be understood that the electric current the conducting wires 45 extending in through the central opening 46 of the rear end cap 47 for the cylindrical handle 22, one of the wires being connected with the core and the other being preferably connected with the contact supporting post 44, although the wires may connected in any suitable manner and leadfrom any suitable source of electricity. The cap 47 may be provided with an inner fiange 48 for engagement in the end of the handle 22 and a stop shoulder 49 for`en gagement with the end of the handle 22. as shown in Figure 2 of the drawings or the cap maybe of any other suitable construction and may either be frictionally engaged with the handle 22 or threaded therein if desired. The'cap 47 is shown as being of semi-spherical form and provided with an insulating sleeve 50 threaded in the central opening 46 of the cap 47, around thev wires 45 to protect the wires 45 from coming in contact with the cap 47, the sleeve 5() having an outwardly directed flange 51 contacting with the outwardly directed portion of the cap 47, around the opening 46, when the sleeve 50 is in position in the opening 46.

When the parts of this device are properly assembled, the space or air gap between the end of the laminated plunger 29 when in its outermost position, and the pole piece 28, should be equal to thelength of the stroke of the laminated plunger 29, plus a clearance, to decrease the reluctance of the magnetic circuit to the minimum, thereby increasing the flux density or the pull on the plunger 29.

From the foregoing, taken in connection with the accompanying drawings, it is beovercoming push, the sprin lieved that the operation of this device will be-readily understood, as it will be evident that when the laminated plunger 29 is drawn outwardly by the spring 1 9 of the clippers or by a spring of the'massager or other imlement with which the electrically operat-I ing device is employed, the contact point 42 will be brought into engagement with the contact arm 43, Ythereby completing an electric circuit through the main winding 25 of the 'core and causing the laminated plunger 29 to be drawn inwardly. As soon as the circuit is broken, the spring will again act to throw the laminated plunger 29 outwardly. This operation will be repeated, thereby causing continual reciprocation of the connecting rod 12 to properly operate the implement.

When the device is operated by a direct current, the liber regulatin disks 36 will engage the finger 40 of the s eeve 38 during each movement of the laminated plunger 29, carryin the sleeve 38 outwardly on each outwar movement of the laminated plunger 29 to connect the contact points 42 andv 43 and close the circuit to energize the core 25 and thereby causing the laminated plunger 29 to be again drawn inwardly, on which movement the sleeve 38 is again drawn inwardly to break the connection betweeen the contact points 42 and 43. By constructing the device in the manner shown and illustrated, with the iron clad electro-magnet with an air gap between the pole piece and lunger equal to the length of the stroke, p us. a very small clearance, the reluctance of themagnetic circuit is decreased 'to the minimum, thereb increasing the flux density or the pull on time plun er and in operation of the device the p l or flux density increases on the inward stroke, and as the work of the machine and the spring tension increases the load,the increased pull will overcome the increased load in a direct ratio. Furthermore, by having the plunger. ull instead of can be use ir the same place as in han clippers in the o eration of the return stroke. be apparent that by having the lunger pull, the friction on the side and t e connecting 'mechanism will bc diminished.

Bi the use of the secondary coil 26 wound on t e primary coil 25 with the helix in the opposite direction, the terminals making contact so as to form a closed circuit, when the clippers are used on an alternating elec- It will furt ermore tric current; .and the potential of that current passes through zero on each cycle'of operation a current is set up in the secondary winding which produces a magnetic flux that combinesl with that of the primary winding and also lwhen the contacts are broken a momentary current is set up in the secondary, preventing the arcing across the poi-nts and transforming the current that would havel been dissipated in heat in the primary winding into magnetic flux or useful energy in the secondary winding.

The device may be used on alternating currents, without alteration in the construction of the device, whenever desired or when occasion may require.

While the preferred embodiment of 'the invention has been disclosed, it will be understood that minor changes in the details y of construction and arrangement of parts may be resorted to within t e scope of what is claimed, without departing from the spirit of the invention.

' What is claimed is 1. An actuating mechanism includin solenoid winding, a plunger coacting wit said winding, a plurality of magnetic elements constltuting a pole piece, said elements being substantially of U-shape and embracing the winding interiorly to coact withv the plunger and also embracing the windin exteriorly thereof, and a washer exterior y ofthe winding to which said elements are secured exteriorly of the winding, whereby a substantially closed magnetic cir' cuit through the plunger is provided.

2. An. vactuating mechanism includmg solenoid winding, a plunger slidably, disposed in the winding, a plurality of magnetic elements constitutin a pole piece, said elements being substantia l of Ueshape and each havin one leg thereo shorter than the other le t ereof, said elements embracing In testimony whereof I ailix my signature l in presence of two witneses.

MEINHARD H. KOTZEBUE.

Witnesses J. Unmut,

L. M. BowuAN. 

